Sampling and Reconstruction of digital signal in Matlab

1. What is sampling and reconstruction of signals?
2. What is reconstruction in digital signal processing?
3. How do you find the sampling frequency of a signal in Matlab?

What is sampling and reconstruction of signals?

A continuous time signal can be processed by processing its samples through a discrete time system. For reconstructing the continuous time signal from its discrete time samples without any error, the signal should be sampled at a sufficient rate that is determined by the sampling theorem.

What is reconstruction in digital signal processing?

Reconstruction is the process of creating an analog voltage (or current) from samples. A digital-to-analog converter takes a series of binary numbers and recreates the voltage (or current) levels that corresponds to that binary number. Then this signal is filtered by a lowpass filter.

How do you find the sampling frequency of a signal in Matlab?

The sampling frequency or sampling rate, fs, is the average number of samples obtained in one second (samples per second), thus fs = 1/T. To sample a signal in MATLAB, generate a time vector at the appropiate rate, and use this to generate the signal. Plot using the stem function.